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NEWMONT <br /> GOLDCORP <br /> inch steel header and the 12 inch HDPE pipe. Upon reaching pressure <br /> equalization between the two pipes, the structural capacity of the 12 inch <br /> HDPE pipe was exceeded and cracked and then broke at the factory weld. <br /> A formal investigation into the event will be completed. <br /> b. Any known or adverse impacts to human health, property or the environment <br /> No known impacts to human health, property or the environment were <br /> observed. Leach pad staff responded quickly, turned off valves, cleaned- <br /> up off liner cyanide affected soil, and applied calcium hypochlorite to <br /> mitigate any remaining cyanide. <br /> c. CC&V Contact <br /> For any further information regarding this event please contact; <br /> Justin Bills <br /> Environmental Manager <br /> PO Box 191, <br /> 100 N 3rd St, <br /> Victor, Colorado, 80860 <br /> Work: 719-689-4046 <br /> Cell: 719-306-3388 <br /> Fax: 719-689-3254 <br /> d. Monitorinq and analyses that are necessary to evaluate the situation and <br /> corrective actions <br /> ® Sampling occurred pre-cleanup of the off-liner impacted soil and post <br /> clean-up. Analyses will be available in the next 30-45 days. <br /> e. Results of the Operator's investigation <br /> After initial review of the incident, it appears this release was due to a valve being <br /> closed at the 9,750 elevation on the 12 inch HDPE pipe which caused a pressure <br /> differential between the 30 inch steel header and the 12 inch HDPE pipe. Upon <br /> reaching pressure equalization between the two pipes, the structural capacity of the 12 <br /> inch HDPE pipe was exceeded and cracked and then broke at the factory weld. <br />